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Plate Heat Exchanger swap advice?

Discussion in 'Plumbing and Central Heating' started by Fez111, 2 Jan 2019.

  1. Fez111

    Fez111

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    Hi All, can i take your advice on something please?

    I have a Main Combi Eco 30 and it seems like my plate heat exchanger is clogged up (from researching symptoms). I've bought a replacement online and want to have a go at replacing myself, so I know for future reference too for cleaning/ maintenance.

    If I run through the steps I am thinking can you please advise if I've missed anything out or doing incorrectly.

    1. Switch off electric to boiler
    2. Turn off all pipes below boiler
    3. Remove Cover
    4. Drain boiler only (not full system) using white release valve with bucket underneath.
    5. Remove (plate) heat exchanger screws, then unit itself. (Is there anything else I'll have to remove first to get to it?)
    6. Replace with new HE and screw back in.
    7. Refill boiler using normal filling loop.

    Do I need to know about filling or releasing air? or about greasing any parts? or any other tips/advice?

    Thanks in advance guys,
     
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  3. ollski

    ollski

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    Lots of blue roll, it’s generally the easiest of them all to do although I’m allowed to remove the side panel for easier removal cause I got a gas safe card! :)
     
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  4. nwgs

    nwgs

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    Make sure you try your hot water taps before you strip it down. They should stop running if isolated properly. Leave them open too, it can stop water making its way back to the boiler
     
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  5. Fez111

    Fez111

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    Thanks for your help guys, followed the advice and just replaced the PHE. When i unpacked it, it was a bit thicker than the original but I called the (online) supplier who told me it should be fine/better.
    However, I now have a problem that when I run the hot water - after closing the tap I can hear sloshing sounds. A bit like those of a washing machine if that makes sense? Can you advise anything on this, or suggest to start a new thread?
    Thanks in advance,
     
  6. muggles

    muggles

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    Don't start a new thread, that'll just cause confusion. The sloshing sound is likely to be air in the boiler which hasn't been vented properly
     
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  7. Fez111

    Fez111

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    Thanks for the quick reply Muggles, what would be the best way to vent this?. I’ve tried googling but not been able to find the right way to do it.
     
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